From 26107309c08f8548a2e0aef0d0aabd64bc2d22c1 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Wed, 5 Dec 2012 18:46:04 +0100
Subject: ssb: set the PMU watchdog if available
Some ssb based devices have a PMU and the PMU watchdog register should
be used instead of the register in the chip common part, if the device
has a PMU. This patch also calculates the maximal number the watchdog
could be set to.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/ssb/driver_chipcommon.c | 38 ++++++++++++++++++++++++++++++++++++--
1 file changed, 36 insertions(+), 2 deletions(-)
(limited to 'drivers/ssb')
diff --git a/drivers/ssb/driver_chipcommon.c b/drivers/ssb/driver_chipcommon.c
index 603b63032e93..6e080f6a07a5 100644
--- a/drivers/ssb/driver_chipcommon.c
+++ b/drivers/ssb/driver_chipcommon.c
@@ -288,6 +288,24 @@ static u32 ssb_chipco_alp_clock(struct ssb_chipcommon *cc)
return 20000000;
}
+static u32 ssb_chipco_watchdog_get_max_timer(struct ssb_chipcommon *cc)
+{
+ u32 nb;
+
+ if (cc->capabilities & SSB_CHIPCO_CAP_PMU) {
+ if (cc->dev->id.revision < 26)
+ nb = 16;
+ else
+ nb = (cc->dev->id.revision >= 37) ? 32 : 24;
+ } else {
+ nb = 28;
+ }
+ if (nb == 32)
+ return 0xffffffff;
+ else
+ return (1 << nb) - 1;
+}
+
void ssb_chipcommon_init(struct ssb_chipcommon *cc)
{
if (!cc->dev)
@@ -405,8 +423,24 @@ void ssb_chipco_timing_init(struct ssb_chipcommon *cc,
/* Set chip watchdog reset timer to fire in 'ticks' backplane cycles */
void ssb_chipco_watchdog_timer_set(struct ssb_chipcommon *cc, u32 ticks)
{
- /* instant NMI */
- chipco_write32(cc, SSB_CHIPCO_WATCHDOG, ticks);
+ u32 maxt;
+ enum ssb_clkmode clkmode;
+
+ maxt = ssb_chipco_watchdog_get_max_timer(cc);
+ if (cc->capabilities & SSB_CHIPCO_CAP_PMU) {
+ if (ticks == 1)
+ ticks = 2;
+ else if (ticks > maxt)
+ ticks = maxt;
+ chipco_write32(cc, SSB_CHIPCO_PMU_WATCHDOG, ticks);
+ } else {
+ clkmode = ticks ? SSB_CLKMODE_FAST : SSB_CLKMODE_DYNAMIC;
+ ssb_chipco_set_clockmode(cc, clkmode);
+ if (ticks > maxt)
+ ticks = maxt;
+ /* instant NMI */
+ chipco_write32(cc, SSB_CHIPCO_WATCHDOG, ticks);
+ }
}
void ssb_chipco_irq_mask(struct ssb_chipcommon *cc, u32 mask, u32 value)
--
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